WO2022145374A1 - 保護素子及び電子機器 - Google Patents

保護素子及び電子機器 Download PDF

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Publication number
WO2022145374A1
WO2022145374A1 PCT/JP2021/048270 JP2021048270W WO2022145374A1 WO 2022145374 A1 WO2022145374 A1 WO 2022145374A1 JP 2021048270 W JP2021048270 W JP 2021048270W WO 2022145374 A1 WO2022145374 A1 WO 2022145374A1
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WO
WIPO (PCT)
Prior art keywords
terminal
fuse element
fuse
intermediate electrode
protective
Prior art date
Application number
PCT/JP2021/048270
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
潤平 氷見山
Original Assignee
デクセリアルズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by デクセリアルズ株式会社 filed Critical デクセリアルズ株式会社
Priority to CN202180086748.6A priority Critical patent/CN116648839A/zh
Priority to US18/268,420 priority patent/US20240021386A1/en
Priority to KR1020237018402A priority patent/KR20230098309A/ko
Publication of WO2022145374A1 publication Critical patent/WO2022145374A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/46—Circuit arrangements not adapted to a particular application of the protective device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/583—Devices or arrangements for the interruption of current in response to current, e.g. fuses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/46—Circuit arrangements not adapted to a particular application of the protective device
    • H01H2085/466—Circuit arrangements not adapted to a particular application of the protective device with remote controlled forced fusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H01M2200/103—Fuse
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to protective elements and electronic devices.
  • This application claims priority based on Japanese Patent Application No. 2020-219150 filed in Japan on December 28, 2020, the contents of which are incorporated herein by reference.
  • a structure is known in which the fuse element itself generates heat and blows when an overcurrent exceeding the rating is applied to the circuit board, thereby interrupting the current path.
  • a protective element it has a heating element (heater) inside, and in the event of an abnormality other than the generation of overcurrent, the heating element is energized by energizing the heating element to generate heat, and the heat is used to generate a fuse element.
  • the heating element is energized by energizing the heating element to generate heat, and the heat is used to generate a fuse element.
  • Patent Document 1 discloses a protective element having a first fuse element and a second fuse element connected in series, and a heating element connected between the first fuse element and the second fuse element. This protective element is configured so that when an overcurrent flows through the first fuse element and the second fuse element, the first fuse element is cut off before the second fuse element.
  • LPS Limited Power Source
  • UL2054 battery pack standard
  • a fuse in the power supply of a device having an output voltage of 20 V or less such as a mobile device. It is necessary to use a fuse having a rated current value of 5 A or less on the discharge side, and for that purpose, it is necessary to increase the resistance value of the fuse (5.0 m ⁇ or more).
  • the need for quick charging is increasing, and in the case of quick charging, a high current with a charging current value of 5 A or more flows, so it is necessary to set the resistance value of the fuse to 1.0 m ⁇ or less. be.
  • the present invention has been made in view of the above circumstances, and an object thereof is that the current path can be cut off even at a relatively low current value during discharging and the current path is not cut off even at a relatively high current value during charging. It is an object of the present invention to provide a protective element capable of quick charging. Another object of the present invention is to provide an electronic device represented by a mobile device equipped with such a protective element and a power supply.
  • the present invention provides the following means for solving the above problems.
  • the protection element includes a first terminal, a second terminal and a third terminal connected to the first terminal, respectively, and has the first terminal and the third terminal. At least a part of the fuse element to be connected has a higher electric resistance than the fuse element connecting the first terminal and the second terminal.
  • the first fuse element is further provided with an intermediate electrode and connects the first terminal and the intermediate electrode, and the second terminal and the intermediate electrode are connected to each other. It has a second fuse element and a third fuse element that connects the third terminal and the intermediate electrode, and the third fuse element may have a configuration having a higher electric resistance than the second fuse element. .. (3)
  • a first fuse element further comprising an intermediate electrode, the second terminal and the intermediate electrode are directly connected, and the first terminal and the intermediate electrode are connected to each other.
  • the third fuse element may have a third fuse element connecting the third terminal and the intermediate electrode, and the third fuse element may have a configuration having a higher electric resistance than the first fuse element.
  • a fourth terminal may be further provided, and the fourth terminal may be connected to the intermediate electrode via a heating element.
  • the first terminal is connected to a power source capable of charging and discharging
  • the second terminal is connected to a charging line
  • the third terminal is connected to a charging line. It may be configured to be connected to a discharge line.
  • the electronic device includes a power supply and the protection element according to the above (1) to (5) connected to the power supply.
  • the configuration also includes a control device that detects the voltage of the power supply and a switch that operates when the power supply is overcharged based on the detected voltage. good.
  • the power source is a lithium ion secondary battery or a capacitor.
  • the present invention it is possible to provide a protection element capable of cutting off the current path even at a relatively low current value during discharging and enabling rapid charging without blocking the current path even at a relatively high current value during charging. It will be possible. Further, according to the present invention, it is an object of the present invention to provide an electronic device represented by a mobile device provided with the above-mentioned protective element and a power source.
  • FIG. 2 is a sectional view taken along line IV-IV of the protective element shown in FIG. It is a VV line sectional view of the protection element shown in FIG. It is a top view which shows another example of the protection element which concerns on 1st Embodiment of this invention. It is a top view which shows still another example of the protection element which concerns on 1st Embodiment of this invention.
  • FIG. 1 is a circuit diagram of a power supply unit of an electronic device provided with a protective element according to the first embodiment of the present invention.
  • the electronic device is, for example, a mobile device such as a mobile phone, a smartphone, a tablet computer, or a digital camera.
  • the protection element 1 includes a first terminal 10, a second terminal 20, a third terminal 30, a fourth terminal 40, and an intermediate electrode 50.
  • the first terminal 10 and the third terminal 30 face each other
  • the second terminal 20 and the fourth terminal 40 face each other. Have been placed.
  • the first terminal 10 is connected to the intermediate electrode 50 via the first fuse element 15. Further, the first terminal 10 is connected to a power source 60 provided in the electronic device.
  • the power supply 60 can be charged and discharged.
  • a secondary battery or a capacitor may be used as the power source 60.
  • a lithium ion secondary battery is used as the power source 60.
  • the second terminal 20 is directly connected to the intermediate electrode 50. Therefore, the fuse element connecting the first terminal 10 and the second terminal 20 is the first fuse element 15.
  • the rated current value of the first fuse element 15 is preferably 10 A or more, and more preferably 15 A or more and 30 A or less. Further, the resistance value of the first fuse element 15 is preferably 1.0 m ⁇ or less, and more preferably 0.15 m ⁇ or more and 0.6 m ⁇ or less.
  • the third terminal 30 is directly connected to the intermediate electrode 50 via the third fuse element 35. Therefore, the fuse elements connecting the first terminal 10 and the third terminal 30 are the first fuse element 15 and the third fuse element 35.
  • the electrical resistance when the first fuse element 15 and the third fuse element 35 are connected in series is set to be higher than that of the first fuse element 15. Further, the third fuse element 35 is set to have a higher electric resistance than the first fuse element 15.
  • the rated current value when the first fuse element 15 and the third fuse element 35 are connected in series is preferably 5 A or less, and preferably within the range of 1 A or more and 5 A or less. Further, the electric resistance value when the first fuse element 15 and the third fuse element 35 are connected in series is preferably in the range of 5 m ⁇ or more and 20 ⁇ or less.
  • the second terminal 20 is connected to the charging line of the electronic device.
  • a current flows through the first terminal 10, the first fuse element 15, the intermediate electrode 50, and the second terminal 20. Therefore, when an overcurrent is energized during charging of the power supply 60, the first fuse element 15 generates heat and blows, so that the current path is cut off.
  • the third terminal 30 is connected to the discharge line of the electronic device. When the power supply 60 is discharged, a current flows through the first terminal 10, the first fuse element 15, the intermediate electrode 50, the third fuse element 35, and the third terminal 30. Therefore, when an overcurrent is energized when the power supply 60 is discharged, the third fuse element 35 generates heat and blows, so that the current path is cut off.
  • the fourth terminal 40 is connected to the intermediate electrode 50 via the heating element 45.
  • the fourth terminal 40 is connected to the discharge line.
  • the fourth terminal is connected to a switch 61 provided in the electronic device.
  • the switch 61 is connected to the control device 62.
  • the control device 62 detects the voltage of the power supply 60, and based on the detected voltage, activates the switch 61 when an abnormality such as overcharging occurs in the power supply 60. As a result, a current is supplied to the fourth terminal, and the heating element 45 generates heat. The heat of the heating element 45 is transferred to the intermediate electrode 50, so that the first fuse element 15 and the third fuse element 35 are blown.
  • the electric resistance when the first fuse element 15 and the third fuse element 35 are connected in series is set to be higher than the electric resistance of the first fuse element 15. Therefore, the rated current value at the time of discharging can be made relatively lower than the rated current value at the time of charging, so that the safety at the time of discharging can be ensured.
  • the power supply 60 can be charged with a current value relatively higher than that at the time of discharging at the time of charging, and quick charging becomes possible. Further, in the event of an abnormality other than the occurrence of an overcurrent, the current path can be cut off by generating heat of the heating element 45, so that higher safety can be ensured.
  • FIG. 2 is a plan view showing an example of a protective element according to the first embodiment of the present invention.
  • FIG. 3 is a bottom view of the protective element shown in FIG.
  • FIG. 4 is a sectional view taken along line IV-IV of the protective element shown in FIG.
  • FIG. 5 is a sectional view taken along line VV of the protective element shown in FIG.
  • the protective element 1a shown in FIGS. 2 to 5 includes a substrate 70, a first terminal 10 provided on the substrate 70, a second terminal 20, a third terminal 30, a fourth terminal 40, and an intermediate electrode 50.
  • the substrate 70 is a quadrangle having four sides in a plan view, and each side of the substrate 70 is such that the first terminal 10 and the third terminal 30 face each other, and the second terminal 20 and the fourth terminal 40 face each other. Be prepared for.
  • the first terminal 10 connects the first front surface electrode 11a provided on the substrate front surface 70a, the first back surface electrode 11b provided on the substrate back surface 70b, and the first front surface electrode 11a and the first back surface electrode 11b. It is composed of a first through hole 12 to be formed.
  • the second terminal 20 is composed of a second front surface electrode 21a, a second back surface electrode 21b, and a second through hole 22.
  • the third terminal 30 is composed of a third front surface electrode 31a, a third back surface electrode 31b, and a third through hole 32.
  • the fourth terminal 40 is composed of a fourth front surface electrode 41a, a fourth back surface electrode 41b, and a fourth through hole 42. As the fourth terminal, the fourth back surface electrode 41b can be used alone, and the fourth front surface electrode 41a and the fourth through hole 42 can be omitted.
  • the intermediate electrode 50 is provided on the substrate surface 70a of the substrate 70.
  • the intermediate electrode 50 is directly connected to the second surface electrode 21a of the second terminal 20.
  • the intermediate electrode 50 is extended so as to pass between the first terminal 10 and the third terminal 30.
  • the intermediate electrode 50 is arranged at a position where the distance L3 between the third terminal 30 and the intermediate electrode 50 is longer than the distance L1 between the first terminal 10 and the intermediate electrode 50.
  • the first fuse element 15 connecting the first terminal 10 and the intermediate electrode 50 and the third fuse element 35 connecting the third terminal 30 and the intermediate electrode 50 are connected to each other to form a single strip-shaped fuse connecting body 71. Consists of.
  • the fuse connecting body 71 is connected to the intermediate electrode 50 and the first terminal 10 and the third terminal 30 via a conductive connecting material 72.
  • the fourth back electrode 41b of the fourth terminal 40 is connected to one end of the heating element 45.
  • the other end of the heating element 45 is connected to the second back electrode 21b of the second terminal 20.
  • the heating element 45 is covered with an insulating layer 46.
  • the material of the substrate 70 is not particularly limited as long as it has an insulating property.
  • a substrate used for a printed wiring board such as a ceramics substrate or a glass epoxy substrate, a glass substrate, a resin substrate, or an insulating treated metal.
  • a substrate or the like can be used.
  • a ceramic substrate which is an insulating substrate having excellent heat resistance and good thermal conductivity, is preferable.
  • the material of the first terminal 10 for example, silver, copper, tungsten, or an alloy containing these metals can be used.
  • the material of the fuse connecting body 71 various low melting point metals conventionally used as the fuse material can be used. Examples of low melting point metals include SnSb alloys, BiSnPb alloys, BiPbSn alloys, BiPb alloys, BiSn alloys, SnPb alloys, SnAg alloys, PbIn alloys, ZnAl alloys, InSn alloys, PbAgSn alloys and the like.
  • the conductive connection material 72 for example, a solder material can be used.
  • a high resistance conductive material can be used as the material of the heating element 45.
  • a high resistance conductive material a material containing nichrome, W, Mo, Ru or the like or a metal thereof can be used.
  • the material of the insulating layer 46 for example, glass can be used.
  • the third fuse element 35 of the fuse coupling 71 when an overcurrent is energized during discharging, the third fuse element 35 of the fuse coupling 71 generates heat and blows to cut off the current path. Further, when an overcurrent is energized during charging, the first fuse element 15 of the fuse coupling 71 generates heat and blows to cut off the current path. Further, in the event of an abnormality other than the occurrence of an overcurrent, a current is supplied to the fourth terminal, and the heating element 45 generates heat. The heat of the heating element 45 is transferred to the second back surface electrode 21b of the second terminal 20, and the heat is transferred to the intermediate electrode 50 via the second through hole 22 and the second surface electrode 21a, so that the first fuse element 15 And the third fuse element 35 are blown.
  • the distance L3 between the third terminal 30 of the fuse coupling 71 and the intermediate electrode 50 is longer than the distance L1 between the first terminal 10 and the intermediate electrode 50, so that the third fuse
  • the electrical resistance of the element 35 is higher than the electrical resistance of the first fuse element 15. Therefore, the protective element 1a ensures safety at the time of discharging and enables quick charging at the time of charging.
  • FIG. 6 is a plan view showing another example of the protective element according to the first embodiment of the present invention.
  • the protective element 1b shown in FIG. 6 is different from the above-mentioned protective element 1a in the following points, and is common in other points. Therefore, the parts common to the protective element 1b and the protective element 1a are designated by the same reference numerals, and the description thereof will be omitted.
  • (1) The point that the first fuse element 15 connecting the first terminal 10 and the intermediate electrode 50 and the third fuse element 35 connecting the third terminal 30 and the intermediate electrode 50 are separated.
  • the point where the intermediate electrode 50 is arranged at an intermediate position between the first terminal 10 and the third terminal 30.
  • the point where the width W 3 of the third fuse element 35 is narrower than the width W 1 of the first fuse element 15.
  • the width W 3 of the third fuse element 35 is narrower than the width W 1 of the first fuse element 15, so that the electric resistance of the third fuse element 35 is higher than the electric resistance of the first fuse element 15. Will also be higher. Therefore, the protective element 1b, like the protective element 1a, ensures safety during discharging and enables quick charging during charging.
  • FIG. 7 is a plan view showing still another example of the protective element according to the first embodiment of the present invention.
  • the protective element 1c shown in FIG. 7 differs from the above-mentioned protective element 1a in the following points, and is common in other points. Therefore, the parts common to the protective element 1c and the protective element 1a are designated by the same reference numerals, and the description thereof will be omitted.
  • (1) The point that the first fuse element 15 connecting the first terminal 10 and the intermediate electrode 50 and the third fuse element 35 connecting the third terminal 30 and the intermediate electrode 50 are separated.
  • the first fuse element 15 and the third fuse element 35 are each formed of a fuse element piece 73, and the first fuse element 15 is composed of a plurality of (three in FIG. 7) fuse element pieces 73.
  • the third fuse element 35 is composed of one fuse element piece 73.
  • the number of fuse element pieces 73 constituting the third fuse element 35 is smaller than the number of fuse element pieces 73 constituting the first fuse element 15, so that the electrical resistance of the third fuse element 35 is reduced. , It is higher than the electric resistance of the first fuse element 15. Therefore, the protective element 1c, like the protective element 1a, ensures safety during discharging and enables quick charging during charging.
  • the number of fuse element pieces 73 constituting the first fuse element 15 is 3, but the number of fuse element pieces 73 is not particularly limited.
  • the number of the fuse element pieces 73 may be two or more, and may be in the range of, for example, 2 to 20.
  • FIG. 8 is a plan view showing still another example of the protective element according to the first embodiment of the present invention.
  • the protective element 1d shown in FIG. 8 differs from the above-mentioned protective element 1a in the following points, and is common in other points. Therefore, the parts common to the protective element 1d and the protective element 1a are designated by the same reference numerals, and the description thereof will be omitted.
  • the width W 3 of the third fuse element 35 connecting the third terminal 30 and the intermediate electrode 50 is the first fuse element 15 connecting the first terminal 10 and the intermediate electrode 50. A point narrower than the width W1 of.
  • the width W 3 of the third fuse element 35 is narrower than the width W 1 of the first fuse element 15, so that the electric resistance of the third fuse element 35 is higher than the electric resistance of the first fuse element 15. Will also be higher. Therefore, the protective element 1d, like the protective element 1a, secures safety at the time of discharging and enables quick charging at the time of charging.
  • FIG. 9 is a plan view showing still another example of the protective element according to the first embodiment of the present invention.
  • the protective element 1e shown in FIG. 9 differs from the above-mentioned protective element 1a in the following points, and is common in other points. Therefore, the parts common to the protective element 1e and the protective element 1a are designated by the same reference numerals, and the description thereof will be omitted.
  • the point where the intermediate electrode 50 is arranged at an intermediate position between the first terminal 10 and the third terminal 30.
  • the third fuse element 35 is a fine line-shaped pattern fuse element formed by a printing method.
  • the protective element 1e since the third fuse element 35 is a fine wire-shaped pattern fuse element formed by a printing method, the electric resistance of the third fuse element 35 is higher than the electric resistance of the first fuse element 15. It gets higher. Therefore, the protective element 1e, like the protective element 1a, secures safety at the time of discharging and enables quick charging at the time of charging.
  • FIG. 10 is a circuit diagram of a power supply unit of an electronic device provided with a protective element according to a second embodiment of the present invention.
  • the protection element 2 shown in FIG. 10 is arranged so that the first terminal 10 and the second terminal 20 face each other and the third terminal 30 and the fourth terminal 40 face each other, and the second terminal 20 and the protection element 2. It differs from the protection element 1 of the first embodiment in that the intermediate electrode 50 is connected via the second fuse element 25, and is common in other respects. Therefore, the parts common to the protection element 2 and the protection element 1 are designated by the same reference numerals, and the description thereof will be omitted.
  • the fuse elements connecting the first terminal 10 and the second terminal 20 are the first fuse element 15 and the second fuse element 25.
  • the rated current value when the first fuse element 15 and the second fuse element 25 are connected in series is preferably 10 A or more, and more preferably 15 A or more and 30 A or less.
  • the electric resistance value when the first fuse element 15 and the second fuse element 25 are connected in series is preferably 1.0 m ⁇ or less, and is in the range of 0.15 m ⁇ or more and 0.6 m ⁇ or less. Is more preferable.
  • the electric resistance of the third fuse element 35 is set to be higher than the electric resistance of the second fuse element 25. Therefore, the rated current value at the time of discharging can be made relatively lower than the rated current value at the time of charging, so that the safety at the time of discharging can be ensured. On the other hand, since the rated current value at the time of charging can be made relatively higher than the rated current value at the time of discharging, the power supply 60 can be charged with a current value relatively higher than that at the time of discharging at the time of charging, and quick charging becomes possible.
  • FIG. 11 is a plan view showing an example of the protective element according to the second embodiment of the present invention.
  • the first fuse element 15 and the second fuse element 25 are a band-shaped fuse connecting body 71 having a large width, and the band-shaped third fuse element 35 is compared with the fuse connecting body 71.
  • the width is narrowing.
  • the first fuse element 15 for connecting the first terminal 10 and the intermediate electrode 50 is common, but the width of the third fuse element 35 is narrower than the width of the second fuse element 25, so that the first fuse element 15 is the second. 3
  • the electric resistance of the fuse element 35 becomes higher than the electric resistance of the second fuse element 25. Therefore, the protective element 2a, like the protective element 1a, ensures safety during discharging and enables quick charging during charging.
  • FIG. 12 is a plan view showing another example of the protective element according to the second embodiment of the present invention.
  • the protective element 2b shown in FIG. 12 is common in that the third fuse element 35 is a fine line-shaped pattern fuse element formed by a printing method.
  • the protective element 2b since the third fuse element 35 is a fine wire-shaped pattern fuse element formed by a printing method, the electric resistance of the third fuse element 35 is higher than the electric resistance of the second fuse element 25. It gets higher. Therefore, the protective element 2b, like the protective element 2a, ensures safety during discharging and enables quick charging during charging.
  • the second fuse element 25 that directly connects the first terminal 10 and the intermediate electrode 50 and connects the second terminal 20 and the intermediate electrode 50, and the third terminal 30 and the middle.
  • the third fuse element 35 may have a third fuse element 35 for connecting to the electrode 50, and the third fuse element 35 may have a configuration having a higher electric resistance than the second fuse element 25.
  • the switch 61 of the control device 62 can stop the energization of the heating element 45. It is preferable to control.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Fuses (AREA)
  • Protection Of Static Devices (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Emergency Protection Circuit Devices (AREA)
PCT/JP2021/048270 2020-12-28 2021-12-24 保護素子及び電子機器 WO2022145374A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202180086748.6A CN116648839A (zh) 2020-12-28 2021-12-24 保护元件和电子设备
US18/268,420 US20240021386A1 (en) 2020-12-28 2021-12-24 Protection element and electronic device
KR1020237018402A KR20230098309A (ko) 2020-12-28 2021-12-24 보호 소자 및 전자 기기

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020219150A JP7487098B2 (ja) 2020-12-28 2020-12-28 保護素子及び電子機器
JP2020-219150 2020-12-28

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WO2022145374A1 true WO2022145374A1 (ja) 2022-07-07

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US (1) US20240021386A1 (zh)
JP (1) JP7487098B2 (zh)
KR (1) KR20230098309A (zh)
CN (1) CN116648839A (zh)
TW (1) TW202234446A (zh)
WO (1) WO2022145374A1 (zh)

Citations (4)

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